Takaaki has short and wavy brown hair and wears glasses. His eye color could not be seen.
As of yet, he has only been seen in normal clothing. He wears a green suit (black in the manga) over a blue necktie and a white dress shirt.
Katagiri makes a brief appearance at HQ, greeting Jin.
Katagiri is mentioned as a Fūjin candidate by Jin.
Katagiri Unit is scouting for Border recruits out of town with Kusakabe Unit.
- "Takaaki" is written with 隆 ("noble, prosperous") and 明 (clear, tomorrow, bright), while "Katagiri" (片桐?) means "Kiri splinter".
- Like the rest of his teammates, he was originally a character of Room 303.
- His voice actor, Ryōsuke Kanemoto, also voices Teruteru Kōda.